Anchor for removable bridges for teeth



,KWQWMM E. SORENSEN.

ANCHOR FOR REMOVABLE BRIDGES FOR' TEETH.

APPLICATION FILED FEB-17,1919,

1,814,224. Pat011t0(1AIIg-.-;26, 1919.

WITNESSES lNl/E a fM/l. 50211195 I To (ZZZ ui'hbm it my concern:

1 zen of Denmark, and York city, in the county of New York,

Emuseamen, or

' cor/ r W YORK, N. Y., ASSIGNOR 'ro CERTUS PARALLELOMETER INCL, A'CORPORATION 01 NEW YORK. v

AncHoE roE EEMovAiaLE BRIDGES ron TEETH. I

Specification of Letters Patent. Patented Ai -(r, 26 1919;

Application filed February 17, 1919. Serial No; 277,386.

- Be it know'mthat I, EMIL S6RENsEN,-a citia resident of New of Bronx and State have invented certain new and useful Improvements in Anchors for Removable Bridges for "Ie'eth, of which the followeeth in the mouth, and

ing is a'specificatlon.

The" ob ect of finch'oringfdental bridgework to abutment molars and bicuspids, by means offriction'al engagementof attachments, with sockets in the abutment. teeth.-

."I describing my new attachment, referi ence will be had to the accompanying drawthe sides of the 'ing been around a socket which is 7 ing showingthe preferred form of my invention,

all figures are in perspecin which 7 which is in plan. Fig.

tiv'e except Figure '1 shows the original T form of the bar from which the male-portion of the attachment is made; Fig. 2 shows the bar with a portion of the web removed; Fig. 3-shows the finished form of the male portion of the attachment; the flange'having -been'- folded back upon itself. and away from the web and havgve n a curvature, atter' folding, hne' parallel to the intersection of 'the' web; Fig. 4: shows the adapted to fit into the abutment tooth Fig. 5 shows attachments ap, plied to a bridge carrying two teeth; Fig- 6 shows the abutment teeth with the socketsv in place, one tooth being shown in partial sectiong' Fig. 7

the flange and shows m plan view'the com pleted bridgework anchored in the abutment teeth -which contain the suitably formed sockets. p

To produce the preferred fo of my invention about one-half of the web l-of a suitable length of a T-shaped bar (Fig. 1) is removed (Fig. 2). To form the anchor the flange is then folded back upon itself at substantially the inner end of the remammg ortion of the web, but not into complete contact, the folded portion 2, through the natural resiliency of the metal'of which it is made,-acting as a sprmg, to PIOVlde fIlO- tional engagement b'etween the anchor and socket, and the flanges 3 acting as retaining means or members, to prevent primarily a displacement of the abutment teeth. Preferably the flanges and spring are then curved into concentric arcs.

I this invention is to provide "a new and improved. means for removably particularly to This anchoring device is preferably made of I an alloy of. platinum and iridium t any other material of suitable strength a (1 elasticity to form the spring may be employed, and the material -ou'ght,'of course, tobe noncorrosive. I I

The spring is preferably formed integral with'the anchor. Were the spring soldered to the anchor there would be danger of meltmg this joint while soldering the anchor to the bridge. I

' The object in giving the flanges 3 and spring 2 therurvature shown, is to enable enough material to be used to give the requlsite strength 'to the anchor without weakening the tooth flanges too npar to the edge of the tooth, or

the root of tl I of the tooth, as would be flanges were in a plane.

the case, 'if the It will be noted that when 1t becomes necessary to out into a sound tooth to make an anchorage for a by bringing the edges of the e T too near the pulp chamber bridge, the flanges of the T-shaped pi'ece project from-either side of the web intothe strongest part of the tooth, that is, the enamel while avoiding the 'pulp chamber in which the nerves are prises the central portion of the tooth. The bridge to support the artificial teeth may have any suitableshape and issoldered in the usual manner (or may ot ierwise be suitably attachcd to) web 4 of the attachment.

located and which com- .7 Socket 6, on of which is intended to be cemented to ea 1 abutment tooth, is adapted to receive the anchor '5; the recessed portion 7 thereof beingmade of such width that the spring 2 and the flange 3 will be forced to gether and will hold the anchor securely when the same is inserted. The socket 6 is held in the inlay 8 which is secured in the previously prepared opening in the abutment tooth 9.

My inventionis obviously not limitedto the particular embodiment, or arrangement of elements shown and described herein, but the form of its embodiment may be varied withinthe scope of the appended claims. However, the anchor made in the manner described has all the advantages of an integral, structure, and may be manufactured by a minimum number of simple operations. Moreover, the spring member and the flange member, being united at their lower edges, form a, structure V-shaped in cross-section; thus enabling the anchor to be readily guided the socket. This is. a feature of great practical importance,

the wearer for cleaning and sterilizing purajrecessed member and an engage the same, sa1d anchor being formed ;now clannis':

of a Web and flanges arranged in T-shape,

and a spring-member attached to the flanges,

' said sprmg member and flanges together forming a wedge substantially as and for the purpose described.

21. A bridge anchorlng devioe comprising '-'a'recessed member'and an anchor adapted 1n vlevvof ,the neces- 'sity of the frequent removal of the bridge by amaze to engage the same, said anchorbeing formed of a web'and flanges arranged in T-shape and a spring member attached to the flanges,

said flangesand said spring member be ng disposed in substantially concentric arcs sub-' stantially as and forthe purpose described.

,3. A bridge anchoring device comprising" a recessed member and an anchor adaptedto engage the same,

integrally the flanges being united at their'loWer-edges said anchor being formed 1 of a web, flanges and a spring member all united, the spring member and,

respectively substantially asand for the purpose described. v v In testimony whereof I'hav'e hereunto set my hand. I

EMIL SORENS EN. 

